Carriage tabulating mechanism



Sept. 1, 1953 J. N. HOFFMAN 2,650,689

CARRIAGE TABULATING MECHANISM Filed Dec. 26, 1950 s Sheets-Sheet 1 IN [/5 N TOR JACOB N HOFFMAN QM/m Sept. 1, 1953 J. N. HOFFMAN CARRIAGE TABULATING MECHANISM 8 Sheets-Sheet 2 Filed Dec. 26, 1950 INVEN TOR.

JA'COB N HOFFMAN BY WWW ATTORNEY Sept. 1, 1953 J. N. HOFFMAN CARRIAGE TABULATING MECHAN-ISM 8 Sheets-Sheet 3 Filed D60. 26, 1950 IN VE N TO/i JACOB N HOFFMAN Sept. 1, 1953 J. N. HOFFMAN CARRIAGE TABULATING MECHANISM 8 Sheets-Sheet Filed Dec. 26, 1950 1 1 1 1 11 I 1 1 I I 1 r! I n".p"-

IIK IIFI 75 l l I INVEN TOR J2" JACOB /v. HOFFMAN ATTORNEJ Sept. 1, 1953 J. N. HOFFMAN CARRIAGE TABULATING MECHANISM 8 Sheets-Sheet 5 Filed Dec. 26. 1950 INVENTOR JACOB N HOFFMAN BY 5 Sept. 1953 J. N. HOFFMAN 2,650,689

CARRIAGE TABULATING MECHANISM Filed Dec. 26, 1950 8 Sheets-Sheet 6 lNl/ENTOR JACOB N HOFFMAN wmmz Sept. 1, 1953 J. N. HOFFMAN 2,650,689

CARRIAGE TABULATING MECHANISM Filed Dec. 26, 1950 s Sheets-Sheet 7 INVENTOR. V JACOB N HOFFMAN WWW A TTORNEY Sept. 1, 1953 J. N. HOFFMAN 2,650,689

CARRIAGE TABULATING MECHANISM Filed Dec. 26, 1950 8 Sheets-Sheet s TAB.

g 7 [I IN VEN TOR.

JACOB N HOFFMAN Patented Sept. 1, 1953 warren is TATrES EATEN T OFF 11 Claims. 1

.This invention relates totypewriting machines, and more particularly to carriage tabulating means therefor.

.Eiat platen typewriting machines such as described herein comprise, in :part, a type head, hereinafter referredrto as the carriage, including alphabet and numeralkeys and associated printing elements, which carriage is mounted on a frame for movement,.letter'space by letter space, under the control of an escapement mechanism, by power of a strong coiled band spring. The carriage also includes sa group of tabulator keys which, when individually depressed and so long as one is held depressed, simultaneously releases the'carriage from the control of the escapement mechanism for tabulation by the power exerted byxthezband spring, and conditionsastop associated therewithfor engagement with one of a plurality of cooperating stops rigid in the carriage supportingrframe.and'arranged to arrest the carriage .in various columnar positions. 'The stops rigid in the-frame are arranged to zarrest'the-carriageslightly less'than oneletter space in advance of the desired columnar :position. In prior :m'achinesof this type, the stops acted lupon by the tabulator keys have .:'been removed from engagement with the rigidstops by springs 'Wh'entthe tabulator key is :released itoxenable the carriage to acomplete its :tabulatory movement under control rof the aforementioned ieseapement mechanism. efiuchiconstruction leaves :the :machinein a eonclition'whic'hienables :depressinn of thee-same tabulator'k'eyrfor .a;p1ura1ityfof:successive tabulations ofithe'carriage'withoutiinterferencabetween the movable :and rigid stop :members.

The carriage is, generally, of considerable weight. The band spring fto move the :carriage must :contain sufiicient reserve #power to in'itiate substantially instantaneous movement o'f the carriageffrom ranyio'f its positions on its supporting :frame; and because of this, -*the pressure applied to the movable stop member-necessitates the employment: of strong key restoringsprings to efifect their ilisengagement from the rigid *stop member upon the release of a tabula'tor key. These'key restoring springsimust be tensioned by depr'essionpf the tabulator key and consequently the'pressure requiredto' operatea tabulator key is considerably :greater than that required to depress an alphabet'or numeral key-to effect action of the associated power operate'd printing element.

'The diiference inpressure required to operate the dilferent sets o"f keys is undesirable, asit provides an unbalanced -keyboard which affects the ft-ouch .ofa machine operator-and retards speeu of machine operation.

.Anotherdifficulty with such prior machines is due to the weight'of the-carriageand the-strong band :sprin'g required to :move it for tabulation and letter space movements. During tabulatin g movements of labout twoor more inches,:.the tmomentum of .the carriage .is :suchasto impose a severe strain'on the'rigid stops resulting in frequent breaking of the stops since they must be made of veryihard andconsequently brittlesteel.

Also the rigid stops must beaboutfiveletter spaces in thickness at their base if they are to give satisfactory service .and this thickness ,prevents useof closely'adjacent columnar positions for tabulation.

One object'of the :present invention is toi'provide a tabulating mechanism for -a .flat gplaten typewriting :machine wherein the pressure required -to operate the itabulator keyis-substantia'lly-the same as the pressurerequired topperate the alphabet and :numeral keys.

Anotherobject. is the provision of a tabulating inechanism which will5permit the use'of'anreasily operated key mechanism :to "control tabulating movements of a heavy typing carriage.

a t-further object :of the invention is the provision of .a :tabulating mechanism which iwillinot put any appreciable strain :on the-.carriage arresting columnar stops, thus .enablingilight :stop members to be used.

Still another object :is the iprovisi'on of *ataLbulating mechanism suitable ifor .heavyttypingrcarriages which tabulating :mechani-sm uses :thin columnar position'members'which may be spaced at zletterzspace intervals to-control the arresting of the carriage.

It isalso anrobject-of this invention .to .provide a fiat platen typewriting machine'having a heavy typing carriage with a tabulating mechanism having advantages similar to the tabulating mechanism for standard typewriters, thatis key settabletabulator stop :members arranged at single letter space-intervals.

Withtheseand other incidental objects in .view, the invention consists in certain novel features of construction andcombination of parts, the important elements of which are included .in the showing of a preferred embodiment of the invention hereinafter described with reference .to the accompanying drawings formingpart of this description.

In the drawings:

Figure 1 is a'top plan iew showing theparts in their normal or inoperative position,

Figure 2 is a right side view, partly in section, showing the tabulator mechanism, the tabulator stop setting and the tabulator stop restoring mechanism in normal position,

Figure 3 is a view similar to a part of Figure 2 showing a tabulator key depressed and the carriage midway between columnar positions,

Figure 4 is a view similar to a portion of Figure 2 showing the tabulator key depressed and the tabulator stops disengaged,

Figure 5 is a detail View showing the carriage escapement mechanism disengaged when the mechanism is in the condition illustrated in Figure 3,

Figure 6 is a view similar to Figure 5 but showing the escapement mechanism reengaged when the tabulating mechanism is in the condition shown in Figure 4,

Figure 7 is a perspective view showing the mounting mechanism for the tabulator stop rack,

Figure 8 is a top plan view showing the parts in the position of engagement of the carriage and frame tabulator stops just prior to the instant of arrest of the carriage from the tabulation movement and while the tabulator key is held depressed,

Figure 9 is a view in vertical section taken on the line 9, Flgure 8, showing the parts during the initial portion of a tabulating movement of the carriage,

Figure 10 is a view similar to Figure 9 showing the parts in the positions they occupy during the arresting of tabulation of the carriage,

Figure 11 is a view similar to Figures 9 and 10 showin the parts in the positions they assume during the completion of the movement of the single revolution clutch, after carriage tabulation has been completed,

Figure 12 is a top plan view showing the carriage tabulated to a columnar position with the tabulator key held depressed, and the tabulator bar in its rearward position,

Figure 13 is a view similar to a part of Figure 12 showing all mechanisms in their restored positions except the tabulator key which is held depressed,

Figure 14 is a top plan view showing the normal arrangement of the tabulator stop setting and resetting mechanism,

Figure 15 is a detail view showing the tabulator stop set key depressed,

Figure 16 is a detail view showing the tabulator stop reset key depressed,

Figure 1'7 is a perspective view showing a part of the tabulator stop setting mechanism, and

Figure 18 is a fragmentary detail view showing the resetting of the tabulator stops during a return movement of the carriage toward its first letter writing position.

The present invention is illustrated and described herein as embodied in the well-known Elliott Fisher Flat Platen Typewriting and Accounting Machine, one type of this machine being disclosed in Patent No. 2,370,505, issued to Oscar J. Sundstrand on February 2'1, 1945, to which reference may be had for details of construction not fully described or illustrated herein.

Referring to Figure 1 of the drawings, the machine includes a line space frame 26 which is mounted for forward and rearward movement, on a main frame, not shown herein. Mounted for tabulating and return movements on the frame 26 is a typing carriage 21. Included in the carriage are the usual alphabet printin keys,

numeral printing keys, space key and the tabulator keys 3|.

The carriage 21 is arranged to travel to the right, Figure 1, letter space by letter space upon the depression of any of the alphabet and numeral keys and the space key under the control of an escapement wheel 32, Figures 5 and 6. The mechanism provided for initiating letter space movement by these means is not described herein since it is shown in the above Sundstrand Patent No. 2,370,505 and with the exception of the escapement wheel 32 and certain of its associated parts, it does not concern the present invention. In general, upon the depression of one of the above keys, an escapement dog 33, Figures 5 and 6, is rocked from its normal engagement with the escapement wheel 32, as shown in Figure 6, to a position comparable with that shown in Figure 5, to allow the carriage to letter space under power provided by a coiled hand spring 34, Figure 1, connected with the carriage 2! by means of a band 35.

The carriage 21 is returned to the left from a tabulated position by power derived from an electric motor 36 driving a shaft 31 through a train of gears 38, 39, 40 and 4|, Figure 1. The shaft 31, driving a ratchet operated brake mechanism designated generally at 42, controls the speed of tabulation and returns the carriage 21 in the usual manner.

The machine is arranged for either columnar or decimal tabulation of the carriage 21 by the depression of keys 3|. Keys 3| are pivotally supported by hangers 43 dependin from the carriage cover 44, Figures 2 and 4, and overlie a common bail 45, pivotally supported at 46 in the carriage frame and urged upwardly by springs 4'1. Secured to each of the keys 3| is a push rod 68, Figures 2, 3 and 4, connected at 49 to shafts 56, and by means of the shafts 50 to stop members 5| pivotally supported on a shaft 52 in a frame 53 in the manner disclosed in the Patent 2,370,505 previously referred to, and in Patent No. 1,280,697, issued October 8, 1918, to H. A. Foothorap. The stop members 5| are arranged in spaced relation in the frame 53 conforming with the letter space arrangement provided in the machine and are normally retained in an inoperative position as shown in Figure 2 by the urge of contractile springs 55, see Figure 3.

Each of the keys 3| is arranged to release the carriage 21 for tabulation upon being depressed. For such release, a push rod 56 is pivotally supported at 51 on a bracket 58 rigid on the common bail 45. Co-extensive but not rigid with the push rod 56 is a member 59 extending downwardly through the deck 60 of the carriage 21 and connected at 6| to a lever 62, Figures 5 and 6. The lever 62 is pivotally supported at 63 on the carriage frame and is formed with an ear 64 underlying an extending tail 65 of the escapement dog 33 which is pivotally supported at 66 in a frame (not shown) and tensioned into engagement with the teeth of the escapement wheel 32 by means of a spring 61. Interposed between a collar 68 aimed to the push rod 56 and the member 59 are filler pieces 69, the purpose of which will be later described. Upon the rocking of bail 45 by the depression of any one of the keys 3|, the push rod 56, acting upon the filler pieces 69, forces the member 59 downwardly to rock the lever 62 about its pivot 63 against the urge of a spring I6, and, by means of the ear 64, rocks the escapement dog 33 from engagement with the teeth of the escapement wheel ase-emcee :32 :illustratedin Figure 55, thereby releasing rthe:carriagefontabulation.

i simultaneously with the releasing Oflthe carrriageill :for tabulation assdescribedabove, 1 upon :the depressionso'f askey GLithepush rodcdfi connecte'd :ttherewith, rock '.-its associated :shaft :50, and consequently the stop member 5| .-connected thereto :is .moved :marwardly against the urge of lthe springs 55 linto position xfor :engagement with ?frame mounted stops i'H vduring thessta-bulation'ofi the'carriage.

KIhe stops H are -supported for movement :on the line vspace frame 26 'iforwardly Ito operative land :rearwardly :to inoperative positions in .a 3U+shaped=tabulator bar fli2,.in the=same"manner @as the stops illustrated :and fully described :in iPatent INo. 12,27 8,010,:issued to W. Helmon'd 1011 March 31, 11942. The-stops 'fllkare arrangedin ithe *tabulator bar 12 at. :letter space distances.

By the useof the different tabulator-keys '31 the carriage 2'! may :be tabulated ..directly 'to ;-a :desired decimal positionrimacolumnbf the work :sheet. On the otherzhand, certain types nfcwork .produced in machines of the characterdescribe'd herein :require the combining of columnar Land decimal tabulation. In the "prior machines, .a separate key :is provided for initiating columnar tabulation. .In "the present machine, the :dollar tabulator'key :3rl;a, Figure 31, may be employed ;'for this :purpose as well as :for decimal itabulation. Such an arrangement provides for either columnar or :decimal itabulation from arsingle :set of keys.

:Conditioningof :the machine to: arrestithe car- *riage i2! in:any columnarsor decimal position is obtained by setting selected rs'tops ="H forwardly iinthe tabulatorbarin azmanner torbe later described to define columnar positions. During tabulation of 'thebarriage 2'! under :control of a depressed tabulator :key 31 the =stop member $51 extended by the depression of the key 3| abuts the rnext adjacent extended stop H to the right and thereby :effects release :of :the rescapement dog 33 :from control'by pushmodifi. *Escapemen't dog 33' is :then returned :by the spring 61 -:to:'position for engagement with :the next tenth :of 'the escapement wheel 32.

The present inventionprovides'rmeans to disengage :the stops El and H and release :escape- -ment dog 33 by1power. zispring i'55al'eilT8qllilBd onlyto retain'the unoperated tabulator'keyslifll in their normal positi'on and ea'chztabulatorrkey 31 is. opposed only "-by Ithe resistance offered by the light springs ".41 and I 55, thelcombinedrresistcanoe o'f said springs tbeing substantially equal to-that offered by the-alphabetandv numeral keys and3the space bar keys. For this :purpose, ithe tabulator tbar T2 :issupported :for; forward, rearward and transverse movements in "a :pair of blocks 13 and 14 :affixed in the "frame 126. One

zend'of the tabulator bar I2 is slidably retained i'inia semi-rectangular seat 15, Figures 6 and 7, provided in the block [3, while the otherrend of the :bar 12 is slidably supported in an upwardly opening seat 16, in the-block '14, Figure 12, where it is held-againstrupward movement-by means of a-catch, not shown, inthesame manner as isdisclosed inFoothorapzPatent No. 1,280 697, above. Normally, Ithe tabulator bar 12 is tensioned leftwardly -to .bear against .an .adiusting :screw 18 in the frameifi by a plunger :19, slidably supported in a member 8ll affixedto-themachine frame26, andr-acted upon by acompression-spring 8|, Figures t-B and 12. The adjusting .screw J8 6 esoithatseach -ofi the stops llithereirrcan be aligned with thesspaces' between theblades 51 *an'd 'screw 18 is locked in that :pos'ition iby*means of=a=lock :nut18a.

:Pivot-ally :supported :in "brackets 84 and 585 :afiixed ito the right and 'sleftsides respectively nftthe frame :ZB'is aashaftzflfi. Rigidon -the shaft 28,6 caretwo levers 2&1randupivotallyssupported on r each :lever .81 is.-aT'hooki-88 whichihooksgover the etabulator "bar :12 at its "ends, z-as shown fin detail in Figure '7. ,rAlsoyrigid 'on the shaft "86 is ade- :pendin g :arm 289, slidably supporting :thereon by -meansrof a'stud 90,.1Figures"7 and 9'to lil,sailink 19 I provided with :a slot T92, in which :sstud 90 is engaged. A spring 93, stretched between the stud 9'0 and 1a 81711111 194 :afiiXed in the frame "25, :normallyturges the ashaft 85 :to rock elockwise, Figures"? and 9-130 11, and byzmeans of the hooks F88 holds the tabulator bar 12 in itsrforwardmeo rSltiOl'l. The link :9! is pivotallyrsecured .'at 295,

:Figuresii), lzand 1'1, to a'discw96, forming :part

.ofasinglerevolutionclutch which is substantially :of the same construction as the. clutch described and illustrated in ;Patent No. 2,362,222, :issued to O. J. Sundstrandbn November 7, 1944. "The clutch includes, generally, a gear :91 ;rotatably supported on a stud 98 rigid in gthermachine frame l26,'and driven by *a gear!!!) :rigid ionthezconstantlyrevolving shaft :31. Afiixedcon thecgear 9"! :is ea ratchet wheel 4'00 and :mounted tforltfree rotation on the stud r93 :igathe beforenrentioned =disc 96. Pivoted at :|.0.l, Figures-9 :to l-Lpn'the disc 95 :is :a pawl 1 .02,normallytensionedttoward rengagement with the :teeth "of the iratchet wheel 42,0 :by meansbf :a leaf spring I03, and zhaving an upstanding lug 104. ..A Flever M ;'pivotally :mounted on -a :stud 10-! depending from the bracket-r84, extending :rearwardly, :rests .in front .of the'upstarrdinglug r- H14- of the pawl rl 02 under :the urge 'of -a spring H18, :and :holds the -;pawl 1.02 normally out Of engagement with {the \teeth :in ther-ratchet :wheel I 00, r as 'shown in Figure '39. Extending forwardly 'from its pivot on :stud 101, the lever 4,05 provided with .-an =-upstanding member J09, mounted thereon by means of r-screws H0. Eirmly secured to the-tabulator bar J2 is an actuating member I t2 -,extending rearwardly ,-,into lateral alignment with the memher in-9.

During -:tabulating .r'movement :of the scar-triage 2-2 1, a lproiectedestoplmember :5 i "-will abut a pro- -jected cone of *the :frame .stops .M shown .in E'igure18flland ,shift the entire tabulator bar 7 2 :rightwardly, :against the resistance off ered' by the plunger-19 and springifil until bar 12 is arrested :bytheabutment.ofthe plunger l9 and atstop 1 1'3 threaded in the member 80 and locked in .its adjusted positionbymeans'ot-a-lock nut ii 14,:this arresting position beinaslightlylessithan one let- 0 lterespaee :toithedeft of-the final desired position of thelcarriage. During therightwardimovement of the tabulatorbar Hand-just before abutment of tth-eyplunger rl;9with-stop wH-ththe member I I Z on bar "1 Zstrikes the-upstanding member H19 won ilever I 0-5 and :pivots the lever I sufficiently to n'emove its rearwardly sextending *portionqtfrom zahutment with the *upwardly {extending 7 lug 1M Qf the pawl 1.02. Pawl 1.02 thereupon :engagesfin :the(teeth:ofztheponstantlyrotatingxratchet'wheel -lflfi,:.under the'urgeof the spring 103, with a conrseouenticlookwise IIOtELlJlOD, Figure .9, 10f rthe :disc .1316. During the rotation-of disc'fifi, 'the link 9|, hearing against the stud' e 9 in :the l arm :89 rrocks thew-shaft =86 rcounterclockwise against the pull :norm lly tiw {Position the tabulator bar 12 T aofsspring t3 and, by means of the :hooks .83 on to a lever I I1.

levers 8I, draws the tabulator bar I2 rearwardly to disengage the abutting stop members I and II as shown in Figures and 12.

Since, as before mentioned, the stop members II arrest the carriage 27 approximately one letter space to the left of its final destination and are immediately withdrawn from engagement, escapement dog 33 must be released at this time to engage the next succeeding tooth of the escapement wheel 32 and arrest the carriage 21 in its final position; To accomplish this release of escapement dog 33, the filler pieces 69, Figures 2, 3 and 4, are affixed to a slide H5 bifurcated to span the pushrod 56 and pivotally secured at I I6 The lever II I is pivotally supported at I I8 on a bracket I I9 aflixed to the typin'g carriage 21 and is slidably supported at its right end in a bracket I20, Figures 1, 8, 12 and 13, aflixed to the carriage 2I. Lever I I I is tensioned clockwise about its pivot I I8 to the position shown in Figure 8 by a spring I2I to normally retain the filler pieces 69 in position between the member 59 and collar 08, as shown in Figure 2. Rigid in the lever I I! is a depending stud I22 which is positioned behind an upstanding leg I23 of an angle plate I 24, screwed to the top of the tabulator bar I2 and extending transversely on the tabulator bar I2 to overlie the hooks 88 and prevent their lifting during movement of the tabulator bar. As the tabulator bar I2 is moved rearwardly upon the rocking of the shaft 86, as described above, the upstanding leg I23 strikes the stud I22 and pivots the lever I I1 counterclockwise, Figure 12,'to draw the filler pieces 89 from their position between the members 59 and 68, see

also Figure 4. This withdrawal of fillers 69 enables the spring I0, Figures 5 and 6, to return the lever 62 to its normal position and the spring 61 to tension the escapement dog 33 into engagement with a tooth in the escapement wheel 32, as shown in Figure 5, before full disengagement of the stop members 5I and II occurs, and while the tabulator key 3! is held depressed as shown in Figures 4, 12 and 13. Immediately upon the disengagement of the stops 5I and II, the carriage 2I tabulates to its final destination as controlled by the escapement dog 33 entering fully into the adjacent notch of escapement wheel 32 as shown in Figure 6. Simultaneously, the plunger I9, acted upon by the spring 8|, returns the tabulator rack I2 to its leftward position abutting the stop I8, placing the active stop II to the left of the projected stop 5I just before the tabulator rack I2 has reached its rearmost position, as shown in Figure 12. Also, as the tabulator bar I2 moves leftwardly, the member I I2 moves away from member I09, enabling spring I08 to return lever I05 to its position in front of the upstanding lug I04 of the pawl I02.

When the tabulator bar I2 reaches its rearmost position and the stud 95 in the clutch disc 96 passes over center as in Figure 10, the spring 93, opposing such movement of the tabulator bar, snaps the bar I2 forwardly and drives pawl I02 clockwise ahead of the movement of the ratchet wheel I00, bar I2 stopping against the forward ends of its seat in the blocks I3 and I4. During the remainder of the movement of the disc 96 and gear 91, the stud 90 rides idly in the slot 92 in the link 9| as is illustrated in Figure 11. At the end of the revolution of disc 96, upstanding lug I04 of the pawl I02 strikes the end of the lever I05 which has been restored as above described, rocking the pawl I02 about its pivot IM to disengage it from the teeth of the ratchet wheel I00 against the urge of the leaf spring I 03, and thereby limits the movement of the disc 93 to one revolution. A second pawl I28, pivoted on a stud I29 in the frame 26 and tensioned by a spring I30, engages a notch I3I, Figures 9 to 11, in the disc 93, to hold the disc 96 against retrograde movement by spring I03.

When tabulator bar I2 is returned to its forward position by springs 93, the stop member II which has just stopped tabulation of carriage 21 is positioned to the left of the extended stop 5|, as shown in Figure 13, but filler pieces 59 are prevented from entering between collar 68 and member 59 so long as a tabulator key 3I is held depressed. Upon release of key 3| pieces 69 are restored between collar 68 and member 59 by spring I2I, and keys 3| may be again operated for further tabulations of carriage 2I.

The present invention provides means whereby the stop members II may be projected into 0per'able position from the keyboard. A stop setting key I32, Figures 2, 14, and 17, is pivotally mounted on a stud I33 on the carriage 21 and is supported in a guide I34, also secured to the carriage 21, and is tensioned to its raised position by means of a spring I35. Key I32 is connected to a lever I3I pivoted on a stud I38 on the carriage frame, and connected to lever I3I is a link I40. The link I40 is connected at [M with a lever I42 pivoted at I43 and supported in' a guide bracket I44 secured to the carriage frame. A lever I45, pivotally supported on the carriage frame at I45, engages a depending lug IIII of a member I48, supported for forward and rearward movement on'a bracket I49 rigid onthe bottom plate 60 of the carriage 21, see also Figure 1'7. The member I49 is directly behind the stop members II and is in alignment with the space between the blades 5I associated with the tabulator keys 3Ia and 3Ib. Upon the depression of the key I 32 and the actuation thereby of the members I31, I40, I42 and I45, the member I48 is moved forwardly, pushing the stop II forwardly into operating position, as shown in Figure 15 Upon the release of the key I32, the chain c members is returned to normal position by sprinr The present invention also provides means whereby the stops II which have been set in operating position by the depression of the key I32 may be reset or returned to their inoperative position from the keyboard. To this end, a key I50, Figures 2, 14, and 16, is pivotally supported on a stud I5I fixed to the right side of carriage 21. The rear end of this key I50 is connected by means of a link I52 to a lever I53 which lever I53 is pivoted on a stud I54 in the carriage and connected by means of a spring I55 to a cradle I56. The cradle I55 is pivotally supported on the tabulator frame 53 and is provided with a lug I59 which overlies a member I pivoted on shaft 52 outside of the left side of frame 53. The member I60 is provided with a depending leg, the lower end of which is bent into a U shape which fits over the left side part of frame 53 and provides a substantially rigid cam, see also Figure 18, said cam being normally tensioned against the frame 53 by means of a spring I64, Figure 16, similar to the springs 55 for the tabulator blades 5I. Upon the depression of key I50, the cradle I56 is rocked counterclockwise by the lever I53 from the Figure 2 position to the position shown in Figure 16. The lug I 59 on the cradle I55, bearing on the member I50, rocks that member to place the lower U-shaped arm adjacent the talmlator; barflztand inzwipingi relation with the stopsflelg as iSiShOWIIJiIIZFigUIES" lfirand. 18; The: forward: endiof ikeyi: I50 is fOI'mGdEiDtOIER lug: 165 whichlmovesfreelyinsa slotf?a bracket 1 9'1 Zrigid. on the: carriage. frame;..which slot limits? downward and:upwardmovementofithe key were the extent: that; when: depressed. the member lfiils j ustcle'ars .lthe 'tabulator; bar l 21 asshownin Figureil8a Whentthe: key I 50:. is: held: depressed, during: return to :the lleftioi the-marriage 2 I from a tabulatcdl position;v the: lower; U.-shaped end of the member; 169 wipes on: the stops 1 l, .and; restores:- theistops.tottheirrinoperative-position in the tab ulatorr bar: 121

The .above.description isof a preferred embodi+- mentionly: ofr'my'inventi-on-and is not to: be taken inta:limitingsenseas: many structural variations:- are: possible within the. scope of the following claims:

Whatiis claimed-'31s:

1-; .Inia 'typew-ritingxmachine having-a frame, a carriage 'mova'ble thereon, an "escapementmechae' nismi for restraining; said carriage? and power" means to move said carriage in one directionafor; letteri space "andratabulating: movements, a: tabulatinggkey, .m'eans'soperatedrthereby. to free said carriage :from': the; restraint of said escapement mechanisma: columnar stop member,. at stop membeir proi-ectablezsbyv aid: tabulat-ingikey; into: an intercepting; positionwith respect to said columnar: stonrmember one of said-stop mei bers :being:onsaid-frame and the other-Ont said carriage; means mounting; said. columnar stop.- member' fork movement to a non-intercepting position with-respect. to said.- proiectable: stop member and for a limited movement in said mounting means in the: directionv or. said. tabulating; movement when intercepted by. said pro-- jecta'ble stop member, power .meansrcontrolledby said' columnar stop. member during said limited movement: whens-intercepted. by; said? proj ectable stopg-membein to -moVe-TSaidicolumnan. stop. 'rnern v berl ton-the: non-intercepting? position: and means. operated: by said icolumnar stop=- member during said power' operated.movement to free=-sa-id.:es'-- capementlmechanism from" thecontrolvof said tabulatm keyt- 2.-- ma typewriting-imach-ine having a frame. a: carriage ==movable thereon, spring; means. urging:- saidcarriagefor:.movemen-t in artabulating-v-direce tion and .esoapement r mechanism toerestrain :said carriage against movement byz-said- 'springi'means; a. tabulatorkey; a .-c onnection. operable. th'erebylto disable said. escapement-mechanism and-free said carriage .-for tabulating :n-iovement;v aostop meme ber moved..-by; said key,-intol an-eifectiye position,- a normally fixed columnar stop member mounted fora-limited movement-in the direction of carriage travel and shiftable by power in a direction.-p.erp endicular-to the direction of saidccarriage travel; one of said stop members being on said frameiandithea other; on: said carriage in a position such that said projectable stop member Willy: whemprojected, interceptsaid columnar stopmemberduring a tabulatingemovement -of said carriage-and move it said; limited movement, power means controlled by said columnar stop member during said limited movement to shift said columnar stop member in said perpendicular direction to disengage it from said projectable stop member and means operated by said columnar stop member in said power operated shifting movement to cause reenablement of said escapement mechanism.

3;. A! typewriting machine COmDI'iSlIIgz a frame a' carriagemovable thereom in a: tabulati-ngi di rectiom. power means; to. urge said: carriage in i saidi tabulating; direction, an. escapement mech-- anismito.normallycrestrain said carriage against movement in. said direction, and a: tabulating mechanism for said:carriage to determine. movementor.- saidzcar riage to a desired :columnan positiom. said tabulating. mechanism: comprising, atabulator ke y;.a connection operable' thereby: to free-said: carriage i'romthe restraint ofsaid" escapein'ent mechanism; aw normallyfixed coluinnar? stop F member a: stop blade proj ectableby; said tabulator: key 'into -interceptingrelation 5; with said columnar stop member, power means controlled by, said columnar stop member upon engagement thereof. by said proieotable st0p1- blade toewithdraw said'columnar stop. member from: said engagement and aconnection: from said: columnar. stop 1 member: to said tabulator:

key; connectionto disable said tabulator -key con necti'on and thereby restore said carriageto re-' straint by said escapement mechanism 4; In-a typewriting; machine having a frame, acarriagemou-nte'dron said: frame for movement in:atabulating direction and return, means;to-= move said carriage: in said tabulating: direction and anesoapement mechanism tov restrain-said carriage against movement. in said di-rection,-- a tabulatingmechanismicomprising, atabulator key, a connection'including an-interponent between said tabulator key andsaid-escapement mechanism to disable said. escapement mechanism upon depression ofsaid key, aiixed. stop-, a stop blade. proiectablebysaid tabulator. key,- said. fixed stop. and said stop blade. when-projected-being. relatively; movable in intersecting paths, means controlled by. said fixed-stop whenstruck by said projectable stop blade to with-- draw said fiaed stop fromrsaid stop: blade-,gand a-connection operable by. saidcontrolled-means to. withdraw said. interponent to reenable said escapement mechanism.

5; In atypewriting machine having. a frame a carriage: movable on said frame, powermeans to: urge said carriage in a tabulating direction, and an escapement mechanism to normally hold the. carriage stationary againstthe urge of said power means, a-tabulating-v mechanism to control movement of said carriageto a desiredloolumnar p'osition,:. said tabu-lating; mechanism comprising: a tabulator fkey, a normally effective connection: operable: by said key. to disable saidescapement mechanism and free sa-id carriage' for movement byrsaid :power. means macolumnar stopimember, a-r-stopt blade projectable by said tabulaton key..- to.:an-:eliective position with respect to said columnar stop member, cyclically operable meanscontrolled" by: said:columnar stop member when engaged by said: stop blader-to-. -withdraw saidstop, member t from-said: engagement: and; meansoperable by said stopmember during saidzwith drawal to Y disable: saidconnection fromsaid tabul-ator: key to: said escapernent mechanisms 6-. In' a': flat platen typewriter havingea-frame a typingrcarriage sh-ittable-onsaid frame; spring:v means to .urge said-carriage in :onewdirectionand escapement mechanism to hold said carriage against the urge of said spring means, a tabulating mechanism comprising a depressible tabulator key in said carriage, tabulator key operable means to release said escapement mechanism and free said carriage to the urge of said spring means, a stop blade rendered effective by said tabulator key, a stop member on said frame for engagement by said stop blade when so rendered effective, mounting means for said stop member, said mounting means holding said stop member for limited movement with said carriage when engaged by said stop blade and for movement in another direction perpendicular thereto, cyclic means to move said stop member in said other direction, means operated by said stop member during movement with said carriage to initiate operation of said cyclic means, and a slidable connection from said stop member to said carriage, said slidable connection operable by said stop member during movement in said other direction to disable said tabulator key operable means.

7. In a typewriter having a frame, a carriage shiftable thereon, and an escapement mechanism to restrain said carriage against movement in one direction, a tabulator mechanism comprising a columnar stop member, a projectable stop blade, means mounting said stop member for movement in said one direction of carriage shift, cyclic mechanism to shift said columnar stop member in a direction perpendicular to said direction of carriage shift, a cyclic mechanism release arm operable by said stop member during said movement with said carriage, a tabulator key operable to release said carriage from restraint by said escapement mechanism for movement in said one direction and to project said stop blade for engagement with said columnar stop member during said carriage movement and means operated by said columnar stop member during said movement by said cyclic mechanism to disable said tabulator key from control over the release of said carriage.

8. In a typewriter having a frame, a carriage shiftable thereon, and an escapement mechanism to restrain said carriage against movement in one direction, a tabulator mechanism comprising a columnar stop member, a projectable stop blade, means mounting said stop member for movement in said one direction of carriage shift, cyclic mechanism to shift said columnar stop member in a direction perpendicular to said direction of carriage shift, a cyclic mechanism release arm operable by said stop member during said movement with said carriage, a tabulator key operable to release said carriage from restraint by said escapement mechanism for movement in said one direction and to project said stop blade for engagement with said columnar stop member during said carriage movement, means operated by said columnar stop member during said movement by said cyclic mechanism to disable said tabulator key from control over the release of said carriage, resilient means to restore said columnar stop member to its original position during operation of said cyclic mechanism and means operable upon release of said tabulator key to render said tabulator key again operable to release said carriage.

9. In a typewriting machine having a frame, a carriage shiftable on said frame, spring mechanism to move said carriage in one direction and an escapement mechanism normally effective to restrain said carriage against movement, a tabulating mechanism to control shifting of said carriage to a columnar position, said tabulating mechanism comprising a tabulator key, a tabulator key controlled linkage including an interponent to disable said escapement mechanism, a. stop blade on said carriage projectable by said tabulator key, a fixed columnar stop on said frame so positioned as to be engageable by said stop blade when projected, said fixed stop shiftable with said stop blade upon such engagement, a cyclic clutch, clutch release means operated by said columnar stop during shiftable movement with said stop blade, means operable by said clutch to withdraw said columnar stop from engagement with said stop blade, restoring means operable thereafter to restore said fixed stop to normal position, a linkage operated by said fixed stop during said withdrawal movement to withdraw said interponent and thereby disable said tabulator key controlled linkage and restore said escapement mechanism to control over said carriage and means to restore said interponent into said tabulator key controlled linkage upon return of said tabulator key to an undepressed position.

10. In a tabulating mechanism for a typewriter carriage, the combination of a columnar stop bar engageable by projected stop blades during a tabulating movement of a carriage, means mounting said stop bar for limited movement in one direction, a one cycle clutch, clutch release means operated by said stop bar during said limited movement, means operated by said clutch to move said columnar stop bar in another direction, and spring means operable upon release of said columnar stop bar to restore said stop bar to its first position.

11. In a typewriter machine having a frame, a carriage, means urging said carriage in one direction, and escapement mechanism to normally hold said carriage stationary, a tabulating mechanism for said carriage comprising a tabulator key, means operable by said key to disable said escapement mechanism, a counterstop normally in an effective position, a tabulation stop blade settable by said key into an efiective position with respect to said counterstop blade, a cyclic power driven mechanism, a release arm for said cyclic mechanism, said release arm operated by said tabulator stop blade through said counterstop, a connection operable by said cyclic mechanism to withdraw said counterstop from effective position, a linkage connected to said counterstop and operable thereby upon withdrawal of said counterstop to reenable said escapement mechanism and resilient means to restore said counterstop into an eflective position.

JACOB N. HOFFMAN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 908,220 Dukes et a1 Dec. 29, 1908 1,235,158 Pillings July 31, 1917 2,384,060 Yaeger Sept. 4, 1945 

